<!DOCTYPE html>
<html>

<head>
  <meta charset="UTF-8" />
  <title>Hello World</title>
  <script src="https://unpkg.com/react@16/umd/react.development.js"></script>
  <script src="https://unpkg.com/react-dom@16/umd/react-dom.development.js"></script>
  <script src="https://unpkg.com/babel-standalone@6.15.0/babel.min.js"></script>
  <style>
    body{
      padding:5px;
    }

    .PrimaryButton{
      color:red;
    }

    .SecondaryButton{
      color:blue;
    }
  </style>
</head>

<body>
  <div id="root"></div>
  <script type="text/babel">

    const Button = props => {
      const {kind,...other} = props;
      const className = kind === 'primary' ? 'PrimaryButton' : 'SecondaryButton';
      return <button className={className} {...other}/>;
    };

    const App = () => {
      return (
        <div>
          <Button kind="primary" onClick={()=>console.log('clicked!')}>
            Hello World!
          </Button>
        </div>
      );
    }

    ReactDOM.render(<App/>,document.getElementById('root'));
  </script>
  <!--
      Note: this page is a great way to try React but it's not suitable for production.
      It slowly compiles JSX with Babel in the browser and uses a large development build of React.

      To set up a production-ready React build environment, follow these instructions:
      * https://reactjs.org/docs/add-react-to-a-new-app.html
      * https://reactjs.org/docs/add-react-to-an-existing-app.html

      You can also use React without JSX, in which case you can remove Babel:
      * https://reactjs.org/docs/react-without-jsx.html
      * https://reactjs.org/docs/cdn-links.html
    -->
</body>

</html>